You should be able to tell pretty easily if everything's still ok in there. With the big o-ring off, slide the pump in as far as it'll go.. don't forget the phenolic washer which goes on the back of the pump, I didn't see it in your picture. Slide the pump in until it stops. Now shine a light down through the pump bolt holes, is there space between the gasket and the back of the pump? Alternately you can rock the pump side to side, does it seem to pivot off the middle (clutches not seated) or does it feel solidly in the hole? You could also smear a thin layer of grease around the back side of the pump, set it in there, push firmly with only hand pressure and pull it back out to see if the grease was squished out.
I should mention also whenever pulling the pump out, push in on the input shaft to keep everything as seated as it is now.
Anytime I ever pull a pump out I stand 'em up to at least 45 degrees to keep this from happening. I haven't had an AW4 apart, so it's possible nothing came dislodged- sometimes a front band will help hold it all together.